Mark Zuckerberg Is Now Worth $3.7 Billion More Than Thursday Morning

After reporting its second quarter earnings on Wednesday, Facebook's stock is surging and so is Mark Zuckerberg's net worth.

It is trading at the highest price since Facebook's IPO in May 2012. The stock opened then at $38 per share; it closed yesterday at $34.36 up from the low 20s. The nearly 30% increase means Mark Zuckerberg, who vowed not to sell any of his shares during Facebook's first year as a publicly-traded company, is worth $3.7 billion more today than he was yesterday morning. That brings his total net worth to about $16.1 billion.

The sudden faith in Facebook stems from its visible improvement in mobile. During Wednesday's earnings call, Zuckerberg noted that 41% of Facebook's total ad revenue was coming from mobile, up from 30% the quarter prior. Mobile monetization is something investors are watching closely; the unsuccessful transition from a desktop to a mobile experience is killing other companies quickly.